Facing tool for stuffing boxes and the like



y 1939- c. WIESSNER FACING TOOL FOR STUFFING BOXES AND THE LIKE FiledAug. 21, 19157 INVENTOR. her W/ew mar ATTORNEYS 4w siw wp Patented May9, 1939 UNITED STATES PATENT OFFICE signcr to Durametallic Corporation,Kalamacoo, Mich.

Application August 21, 1937, Serial No. 160,253

12 Claims.

This invention relates to improvements in facing tools for stufiingboxes and the like.

The main objects of my' invention are:

First, to provide a novel and improved tool of simplified constructionadapted to be clamped on a pump shaft or other shaft and rotatabletherewith to perform a face turning operation on the ends of a stuffingbox or other surrounding member.

Second, to provide a tool of the type described having relatively fewparts of simple construction whereby a number of successive concentriccuts may be taken to face the end of a stuffing box or other likesurface.

"I'hird, to provide a device of the type described which, :due to itssimplicity, is capable of being accurately manipulated by unskilledpersons.

Further objects relating to details and economles of my invention willdefinitely appear from the description to follow. The invention isdelined in the claims.

A structure embodying the features of my invention is illustrated in theaccompanying drawing, wherein:

Fig. 1 is a fragmentary view in section on line l-l of Figs. 3 and 4,the shaft being in full lines.

Fig. 2 is a view in transverse section. on line 2-2 of Fig. 1.

Fig. 3 is a view similar to Fig. 2, looking in the opposite directionand in section. on line 3-3 of Fig. 1.

Fig. 4 is a view similar to Figs. 2 and 3, being in smaller scale and insection on line 4-4 of Fig. 1.

Fig. 5 is a fragmentary detail View in section on line 5- 5 of Fig. 3.

In the drawing, the reference. numeral indicates a shaft for a pump orother similar ro-- tary mechanism, protruding from a stuffing box theend of which is indicated by the reference numeral 2. The tool of thepresent invention is a facing tool for machining the end 3 of the saidstuffing box whereby a smooth facing surface will be provided thereon tocooperate with a suitable shaft packing or end seal parts. It isdesirable to prepare such stuffing boxes to receive shaft paokingswithout requiring a time consuming and arduous removal of the pump fromits foundation, and the present invention providesa small compact toolof simple construction which may readily mounted on the shaft of thesaid pump or other mechanism and, utilizing that shaft center anddriving means, may be used to machine the end face of the stufiing boxin a manner to be more particularly described.

The reference numeral 4 in general indicates a collar having an opening5 therein adapted to receive the shaft I, the collar being clamped tothe shaft by a number of set screws 6. Collar 4 on one side has acircular land 1 eccentric of opening 5 slidably receiving a cutterholder 8, said holder being the tool carrying element of the two-partdevice comprising my invention and of which the other element is collar1.

The annular cutter holder 8 has a square opening 9 therethroughextending parallel to the axis of the holder and shaft and constitutinga cutter receiving seat. .A suitable machine or lathe tool or cutter iis placed .in opening 9, being secured therein by a radial set screw Hand being adjusted lengthwise by means of anaxially extending feed screw12 carried by the circular flange it of the collar 4. The flange servesas a stop to limit lateral movement and sustain the thrust of the cutterholder.

Cutter holder 8 is by the construction above described adapted to berotated on eccentric land l whereby the cutter seat 9' and cutter ID onthe cutter holder will be brought to positions at varying distances fromthe center of rotation of the tool as a whole, that center being theaxis of shaft l. Such being the case, if the holder 8 is clampedrelative to the collar 4, by turning the said holder and collar as aunit with shaft I, it will be apparent that cutter ill will describe acircular path and perform a circular cutting operation on face 3. Toselectively clamp holder 8 to collar 4, I utilize a number of threadedapertures M in the holder extending parallel to shaft 5, the same beingconcentrically arranged relative to the holder and being engageable witha bolt l extending axially through an opening l5! in flange It of collar4. Accordingly, it will be seen that with one of the openings I4,designated 1 in Fig. 3, and opening l5! in alinement, and with bolt 95threaded in the said alined openings, the cutter it! will be operativelyclamped relative to shaft 5 at a certain distance from the center ofshaft i. The tool is then rotated as a unit through the agency of a bar(not shown) engageable with capstan holes 46 in the periphery of holderii to describe a circular cutting stroke of cutter l0 relative to face3.

When a cut is completed, bolt I5 is released and holder 3 rotatedrelative to the collar to bring another opening it, designated by theindexing numeral 2 in Fig. 3, into alinement with opening it! andaccordingly to shift the cutter i0 radially relative to shaft The cutterholder and collar are then locked by the bolt and rotated as a unit toform another cut overlapping the first cut. The successive indexingholes designated by the numerals 3, 4, 5, and 6 are thereafter broughtinto alinement with and engaged by bolt i5 in a similar manner, orenough of them are engaged to make sufficient radially overlappingcircular cuts to machine the entire face 3.

The feed screw i2 is employed merely to advance cutter if! to adjust thedepth of cut, after which the cutter is clamped by set screw If and thefeed screw i2 backed away. Reference to Fig. 4 clarifies the manner inwhich the successive cuts are made. In that figure, the position ofcutter [0 relative to the stuffing box face is indicated in section asviewed in Fig. 1, and the relative positions thereof when bolt !5 isengaged with successive threaded openings I4 is indicated in dottedlines. It is apparent that the entire surface of face 3 is thusaccurately machined to a uniform depth. Obviously, the position of thecutter Hi need not be changed once it has been set by feed screw 52. Thenumber of threaded openings M may be varied as desired so that lessmetal is removed on each cut and the thickness of the cut may beadjusted at will by manipulation of screws H and H as will be apparent.

My novel tool is characterized essentially by simplicity of constructionand ease of operation. Furthermore it is not necessary to remove thepump from its foundation and take it to a suitable machine tool, such asa coring mill, which may possibly be located at a considerable distancefrom the place at which the pump is operating, in order to prep-are theface of the stuffing box thereof for the reception of a shaft packingsuch as a mechanical seal. The operation of so preparing the face may beperformed in a. short space of time and by persons relatively unskilledin machining work.

I have illustrated and described my improvements in an embodiment whichis very practical. I have not attempted to illustrate or describe otherembodiments or adaptations as it is believed this disclosure will enablethose skilled in the art to embody or adapt my improvements as may bedesired.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is:

1. A tool for machining the face of a stuiiing box or similar member,comprising a collar adapted to be clampingly engaged in mounted positionwith a shaft normally extending through said stuffing box, said collarhaving a land thereon eccentric of said shaft in mounted position, anannular tool holder surrounding and slidably associated with said land,said collar having a peripheral flange adjacent said land acting as alateral stop for said tool holder, said tool holder having a cutterreceiving opening therein and a plurality of threaded keeper openingsdisposed in an arc circumferentially of the tool holder, said flangehaving an opening adapted to be brought selectively into alinement withsaid keeper openings by rotation of the tool holder on said land, a boltextending through said flange opening for selective engagement with oneof said keeper openings, a cutter element in said cutter receivingopening, and a set screw for clamping the cutter in place, said cutterbeing shiftable to different positions radially of the shaft by shiftingof the tool holder on the land whereby successive rotations of the shaftcause successive radially stepped and overlapping cuts to be made on theend face of the stuffing box by the cutter.

2. A tool for machining the face of a stuffing box or similar member,comprising a collar adapted to be clampingly engaged in mounted positionwith a shaft normally extending through said stuffing box, said collarhaving a land thereon eccentric of said shaft in mounted position, anannular tool holder surrounding said land, said tool holder having acutter receiving opening therein and a plurality of threaded keeperopenings disposed in an arc circumferentially of the tool holder, saidcollar having an opening adapted to be brought selectively intoalinement with said keeper openings by rotation of the tool holder onsaid land, a bolt extending through said collar opening for selectiveengagement with one of said keeper openings, a cutter element in saidcutter receiving opening, and a set screw for clamping the cutter inplace, said cutter being shiftable to different positions radially ofthe shaft by shifting of the tool holder on the land whereby successiverotations of the shaft cause successive radially stepped and overlappingcuts to be made on the end face of the stuffing box by the cutter.

3. A tool for machining the face of a stuffing box or similar member,comprising a collar adapted to be clampingly engaged in mounted positionwith a shaft normally extending through said stuffing box, said collarhaving a land thereon eccentric of said shaft in mounted position, anannular tool holder surrounding said land, said tool holder having acutter receiving opening therein and a plurality of keeper openingsdisposed in an arc circumferentially of the tool holder, said collarhaving an opening adapted to be brought selectively into alinement withsaid keeper openings by rotation of the tool holder on said land, meanson said collar for selective engagement with one of said keeperopenings, a cutter element in said cutter receiving opening, and a setscrew for clamping the cutter in place, said cutter being shiftable todifferent positions radially of the shaft by shifting of the tool holderon the land whereby successive rotations of the shaft cause successiveradially stepped and overlapping cuts to be made on the end face of thestufling box by the cutter.

4. A tool for machining the face of a stuffing box or similar member,comprising a collar adapted to be clampingly engaged in mounted positionwith a shaft normally extending through said stuffing box, said collarhaving a land thereon eccentric of said shaft in mounted position, anannular tool holder surrounding said land, said tool holder having aplurality of keeper openings disposed in an arc circumferentially of thetool holder, said collar having an opening adapted to be broughtselectively into alinement with said keeper openings by rotation of thetool holder on said land, means on said collar for selective engagementwith one of said keeper openings, and a cutter element carried by saidtool holder, said cutter being shiftable to different positions radiallyof the shaft by shifting of the tool holder on the land wherebysuccessive rotations of the shaft cause successive radially stepped andoverlapping cuts to be made on the end face of the stuffing box by thecutter.

5. A tool for machining the end face of a stuffing box or similarmember, comprising a collar having a shaft receiving opening and adaptedto be clampingly engaged with a shaft normally extending through astuffing box, an annular tool holder mounted on said collar eccentric ofsaid opening, said tool holder carrying a cutting tool and having aplurality of keeper openings disposed circumferentially of the toolholder, said collar having an opening adapted to be brought selectivelyinto alinement with said keeper openings by rotation of the tool holderon said collar, and means engaging said collar for selective engagementwith said keeper openings, said cutter being shiftable to differentpositions radially of the shaft by said movement of the tool holder onthe collar whereby upon rotation of the shaft successive radiallystepped and overlapping cuts are made on the end face of the stuffingbox by the cutter.

6. In a facing tool of the type described, a collar adapted to bemounted on a shaft, a cutter supporting element on said collar eccentricof said shaft in mounted position, a cutter carrying member on saideccentric element, means for securing said member on said element at aplurality of angular positions, a facing cutter carried by said member,means carried by said collar for initially adjusting said cutter in adirection parallel to the shaft into operative position for a cuttingstroke, and means for securing said outter in adjusted position on saidmember.

7. In a facing tool of the type described, a collar adapted to bemounted on a shaft, a cutter supporting element on said collar eccentricof said shaft in mounted position, a cutter carrying member on saideccentric element, means for securing said member on said element at aplurality of angular positions, and a facing cutter carried by saidmember, said cutter being adjustable in a direction parallel to theshaft for succeeding facing cuts.

8. In a facing tool for a stuffing box or similar member and adapted tobe mounted on a shaft extending through the stuffing box or member, anannular member, means to secure said annular member on the shaft, saidmember having a surface eccentric of the axis of the shaft, a toolholder member slidably mounted on said surface, sald annular memberhaving a clamping opening and a bolt receivable thereby, said toolholder member having a plurality of threaded openings disposedcircumferentially of the tool holder member and adapted to beselectively brought into alinement with said clamping opening forengagement by saidbolt, a cutter carried by said tool holder member, andmeans for securing said cutter in operative position on said tool holdermember.

9. In a facing tool for a stuffing box or similar member and adapted tobe mounted on a shaft extending through the stuffing box or member, anannular member, means to secure said annular member on the shaft, saidmember having a surface eccentric of the axis of the shaft, and a toolholder member slidably mounted on said surface, said annular memberhaving a clamping opening and a bolt receivable thereby, said toolholder member having a plurality of threaded openings disposedcircumferentially of the tool holder member and adapted to beselectively brought into alinement with said clamping opening forengagement by said bolt.

10. A facing tool for a stuffing box or similar member and adapted to bemounted on a shaft extending therethrough comprising a collar means toremovably secure the collar to shaft, an annular cutter holdereccentrically mounted on said collar, means for securing said cutterholder in adjusted positions on said collar, and a cutter carried bysaid cutter holder whereby rotative adjustment of the cutter holder willvary the radial distance of the cutter relative to the axis of thecollar.

11. A facing tool of the class described for a shaft enclosing elementhaving a shaft extending therethrough and rotatable relative thereto,comprising a member having provision for securing the same to the shaftand having a surface eccentric to its axis, a tool holder rotatablymounted on said surface, means for securing said tool holder in adjustedpositions on said member, a cutter carried by said tool holder anddisposed parallel to the axis of the shaft, and means for adjusting saidcutter parallel to the axis and securing it in its adjusted position.

12. A facing tool of the class described for a shaft enclosing elementhaving a shaft extending therethrough and rotatable relative thereto,comprising a member having provision for securing the same to the shaftand having a surface eccentric to its axis, a tool holder rotatablymounted on said surface, means for securing said tool holder in adjustedpositions on said member, and

a cutter carried by said tool holder for adjustr ment, in a directionparallel to the axis of the shaft.

CHRISTOPHER WIESSNER.

